The former official, Timothy DeFoggi, allegedly expressed interest in the violent rape and murder of children in online exchanges and at one point suggested meeting up with another web user to fulfill such fantasies, the Justice Department said in a statement.

DeFoggi, 56, was convicted of engaging in a child exploitation enterprise, conspiracy to advertise and distribute child pornography, and accessing a computer with intent to view child pornography, according to the DOJ.

He was the sixth person convicted in an ongoing investigation into three child pornography websites, the DOJ said. The administrator of the sites has previously been convicted of engaging in a child exploitation enterprise. According to the Justice Department, DeFoggi registered on the site in…